What is the norm for guinea poop? Does it pretty much look the same as chicken poop? The 2 guinea's that I got a week ago are having very dark greenish/blackish runny droppings. It almost looks like tar. Is it supposed to look like that? No worms are visible. They are acting fine and appear to be healthy. Could it be their diet maybe? They don't eat much of the layer feed. Mostly wild bird seed, worms and bread. They are some picky little things.